1564920013 has 2 divisors, whose sum is σ = 1564920014. Its totient is φ = 1564920012.

The previous prime is 1564919987. The next prime is 1564920043. The reversal of 1564920013 is 3100294651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1285796164 + 279123849 = 35858^2 + 16707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1564920013 - 2²¹ = 1562822861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1564920043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782460006 + 782460007.

It is an arithmetic number, because the mean of its divisors is an integer number (782460007).

Almost surely, 2^1564920013 is an apocalyptic number.

It is an amenable number.

1564920013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1564920013 is an equidigital number, since it uses as much as digits as its factorization.

1564920013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1564920013 is about 39559.0699208159. The cubic root of 1564920013 is about 1160.9959770005.

The spelling of 1564920013 in words is "one billion, five hundred sixty-four million, nine hundred twenty thousand, thirteen".